1 Corinthians 8:4,6
As concerning therefore the eating of those things that are offered in sacrifice to idols, we know that an idol is nothing in the world, and that there is none other God but one.
Torrey's Topical Textbook—AKJV

Ephesians 4:6
One God and Father of all, who is above all, and through all, and in you all.
Torrey's Topical Textbook—AKJV

1 Timothy 2:5
For there is one God, and one mediator between God and men, the man Christ Jesus;
Torrey's Topical Textbook—AKJV